Officials did not disclose Lopez's relationship with the girl, describing her only as "an acquaintance."

Bergen County Prosecutor John Molinelli said Thursday that the girl reported to school personnel that Lopez, 51, had abused her twice over the course of a year, once when she was 12 and another instance when she was 13.

School officials then notified Bergenfield Police, who arrested Lopez in Paramus on Wednesday following an investigation conducted alongside the prosecutor's office Special Victims Unit, Molinelli said.

Lopez was detained and charged with one count of sexual assault, one count of aggravated criminal sexual contact and one count of endangering the welfare of a child. He's been ordered not to have contact with the victim and is being held at the Bergen County Jail on $250,000 bail.